In order to consolidate the PHT calibration and verify its adequate
application in OLP data reduction the following program is carried out:
- observation of alpha Boo (Arcturus, HR 5340):     star
This is a well known calibration star with a consolidated spectral
energy distribution. The star is sufficiently bright to be used as
a standard at wavelengths longward of 60 micron. Since the star is very
bright at the shorter wavelengths background observations are taken only
for filters longward of 25 micron.

Multi-filter scans are performed using all PHT filters available to the
observers in AOTs P03 and P22.


.HISTORY
31/01/97        IH, RJL, First version - Arcturus only (email UK to MFK
                13/01/97)

.OTT 3106
.TDT 3826